Dear all, For some reason I noticed that ParaView has some large intervals between writing a PNG for consecutive frames of an animation. Normally there is about one minute between the timestamp of two PNGs, but sometimes there is suddendly a gap of 8 hours:
141K Jan 13 15:56 New_Volume_.0118.png 141K Jan 13 15:58 New_Volume_.0119.png 139K Jan 13 15:59 New_Volume_.0120.png 139K Jan 13 16:00 New_Volume_.0121.png 138K Jan 14 00:34 New_Volume_.0122.png 139K Jan 14 00:35 New_Volume_.0123.png 139K Jan 14 00:36 New_Volume_.0124.png There are multiple occasions where these large intervals happen but this does not happen at a regular interval of the animation. There does seem to be a relation with the amount of memory that is used, since there is a sudden decrease in memory used right after "Jan 14 00:34". Below I will describe my animation and setup. I hope anyone can give an explanation for the behavior. During the weekend I have created an animation of a mixing tank using volume rendering of the concentration of some chemicals in the tank. It is a reasonably large CFD simulation performed with OpenFOAM. There are about 15 million cells (tetrahedrals and prismatic layer), but not extremely large. I saved the concentration every 0.25 seconds for a 120s simulation. We have ParaView 3.98.0 installed on this machine and it was the only program running at the time. I have made the animation with ffmpeg after ParaView made the frames as consecutive pngs. Besides the volume rendering of the concentration, the walls of the tank where shown with a fixed opacity of 0.3 and the internal structure (some rotors and baffles) where present as well. Although the simulation use the MRF concept, I did mimick the rotation of the rotors using the transform filter. Using the "cool to warm" preset for visualization I could nicely set the opacity to 0 when the concentration was in the allowed range and it showed red in case of too high concentration, of blue when too low. The resulting animation is satisfactory, I just wonder what can be done to make sure these large intervals between writing images do not happen. Hope someone can help, if you need more information, please let me know. Regards, Tom -- T.C. Fahner e: tom.fah...@gmail.com
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